Safety-razor.



M. G. SHARPNEGK.

SAFETY RAZOR. APPLIOATION FILED JAN.19,1912.

lllllllllllll' Patented Apr. 22, 1913.

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MATTHEW C. SHARPNECK, OF CORNVILLE, AR1ZONA, .ASSIGNOR OF ONE-HALF TO I E. BLOCK,'0F PRESCOTT, ARIZONA.

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Specification of Letters Patent.

Patented Apr. 2Q, 1913.

l r Application led January 19, 1912. Serial No. 672,032.

To all 'whom t may concern Be it known that I, MA'rrHEW C. SHARP- -NECK, a citizen of the United States, residthereby assuring a sheer cutting action upon v the beard when shaving, thus obviating the necessity of the person manipulating the razor for this purpose, other than guiding the same over theY face of the user.

Another object of the invention is the provision of a safety razor in which the blade thereof is reciprocatingly mounted and operated through the medium of a motor, the safety blade being readily and easily removed from the holder, so that the same may be cleaned and also for enabling the con-` venient cleaning' of said holder.

A. further object of the invention is the provision of a safety razor in which the reciprocatingly mounted blade is automatically actuated to assure a positive cutting action, during the use of the razor.

A. still further object of the invention is the provision of a safety razor which is simple in construction, durable, light in weight, et possessing the requisite strength, thoroug ly reliable and efficient in operation, and inexpensive in manufacture.

{Other objects will be in part obvious and in part pointed out' hereinafter. The invention accordingly consists in the features of construction, combination of elements and arrangement of parts which will be exemplified 1n the construction hereinafter set fort-h, and the scope of theapplication of which will be indicated inthe following claims. i

In the drawings: Fi re l'is a top plan view of a safety razor constructed in accordance with the invention. Fig. 2 is a side elevation thereof. Fig. 3 is a vertical longitudinal -sectional view through the same. Fig.4 4 is a sectional View on the line 4 4 of Fig. 2. Fig. 5 is a sectional view on the line 5-5 of Fig. 2. Fig. 6 is a sec-I tional view on fthe line 6 6 of Fig. 3.

' extern Similar reference characters indicate corviews of the drawings.

`Referring to the drawings by numerals, they safety razor comprises a tubular outer shank rovided at one end with suitable al) threads for detachably connecting thereto a collar 11, the latter and the said shank 10 being formed with alinirig outwardly extending curved ears 12 provided with cam grooves 13 in their inner faces, in -which is detachably engaged a blade clamping device, presently described.

Extending longitudinally through the shank l0 and removable therefrom is an inner tubular shank 14, the same being formed with a guard plate 15 adapted to lie between theears 12, and on which is detachably supported a reciprocatingly mounted razor blade 16, the same being actuated in a manner presently described.

r1`he inner end of the inner tubular shank 14 is provided with suitable external screw threads for the detachable connection thereto of a nipple 17 projecting centrally from one end of a motor casing 18, in which is arranged a motor frame 19 having journaled therein a central main spring winding and unwinding arbor 20, the latter projecting at Ione end outwardly through the opposite end of t-he casing 18, and is provided with a finger key 21, as usual. Fixed to the arbor 20 is one end of a coiled main spring 22, the opposite end of which is connected to a lug or pin-23 fixed to a driving gear 24, the same being loose upon the arbor 20 and meshing with a pinion 25 journaled in the frame 19, the said pinion operating a train' of gears 26 for rot-ating a driven shaft 27 located centrally and extending longitudinally throughout the inner tubular shank 14, the outer end of the shaft 27 being journaled in a bearing 28 formed at the outer end of the said inner tubular shank 14, and this shaft 27 is provided with an abutment ring 29 adapted to contact with the bearing 28, so as to prevent longitudinal displacement of said shaft 27 upon the rotation thereof. l

The driving gear 24 is normally held against rotation by means of a brake rod 30 adjustably threaded in the casing 18 and frame 19, the inner end of which is formed with a brake shoe 31 adapted to be brought into contact wit-h the driving gear 24, while ca-tingly operating the-blade 16, the said shuttle the latter 'to the shuttle or bloc v contact of the shoe 31 with the driving gear 24, the latter will be held locked against rotation, so that the spring 22 can be readily wound about the arbor 2O on the turning ofl the key 21 for this purpose. Formed on the driven shaft 27 is a cam roller or sleevei33 provided with a zig-zag shaped or cam slot 34, into which engages a pin or lug 35 depending from a reciproshuttle or block 36 for or block 36 being formed with a` raised elongated boss 37 ada ted" to be received in a correspondingly 's aped opening formed centrally in the blade 16, thereby detachabl connecting ff 36; thus it will be seen that on rotation of the driven shaft 27, the shuttle 36 will be 'reciprocated and likewise the blade 16 moved therewith upon the guard plate 15 for cutting operation.

The blade retainino; or clamping device comprises a pair of guard shutters or shield plates 38 hinged together at their meeting edges by means of a common pintle 39, the latter having `iixed to opposite ends legs 40 provided with notches 41 adapted to receive the driven shaft 27, thelegs 40 being received in suitable recesses formed in oppoe site'ends of the guard plate 15 when the guard shutters or wings 38 are superim- `posed upon the saine.

Coiled about the pintle 39connecting the guard wings or shutters 38 is a spring 42, the ends being connected in any suitable i manner to the shutters or wings 38, although in this instance, by means of eyes 43, so that the shutters will be sustained under tension and in close contact with the blade 16 upon the guard 16 against outward displacement from the guard plate, when it is reciprocated thereon.

Formed on the legs 40 and .projecting out- -wardly therefrom are retaining lugs 44,

which latter detachably engage in the cain grooves 13 formed in the ears 12, so that upon the turning of the outer shank 10 upon the inner shank 14, the clamping device will be locked in the ears for the holding of the blade 16 upon the guard plate `15, it being seen that on reversely turning the said outer shank 10, the clamping device may be freed from the ears 12, thereby permitting the ready removal of the blade 16 from the guard plate 15 of the razor.

Threaded on the inner end of the inner tubular shank 14, between the inner' end of the outer tubular shank 1() and the nipple 17 on the motor casing 18, is a locking collar 45 which, when turned in one direction, locks the outer shank 14 against turning movement, so that there will1 be no possibility of the clamping device for the blade plate 15, so as to hold said blade.

16 becoming accidentally loose, during the use of the razor. On reversely moving the collar45, the shank 10 may be turned for freeing the clamping device, as hereinbefore described.

- It is obvious that when the spring 22 is wound, and on the unwinding thereof, Ithe driven shaft 27 will be rotated, thus recipro- 4 e catingth'e'blade 16 upon the guard plate 15, whereby on the application of the razor to the face of the user, the blade 1'6 will, in its movement, effect a sheer cutting action upon the beard, so that it is only necessary for the user to guide the razor over the face for shaving purposes. K c

If desired, in lieu of the spring motor, any suitable electric motor can be attached to the driven shaft 27- for operating the sanie.

From the foregoing, taken in connectionv with the accompanying drawings, it is thought that the construction and operation of the invention will be readily understood, without requiring a more extended explanation.

What is claimed is:

1. A safety razor comprising tubular inner and outer shanks, a collar detachably fitted upon the outer end ofthe outer shank, outwardly extending curved ears formed on the shank and collar in spaced alining relation to each other and provided with cam grooves in their inner faces, a guard plate formed on the inner shank and extending between the ears, a motor casing detachably fixed'to the inner end of the said inner shank, a driven shaft disposed within the inner shank and having an abutment ring near the outer end thereof for engagement with the inner shank to prevent outward longitudinal displacement of the said shaft, spring motor mechanism located within the mo-tor casing and having gear connections with the driven shaft for rotating the same, a sleeve formed on the driven shaft and having a cam slot therein, a shuttle overlying tlie sleeve and having a lug engaging the said cam slot for reciprocating said shuttle on the rotation of the shaft, a boss formed on the shuttle, a slotted blade detachably engaging-the boss and superimposed upon the guard plate, a blade retaining clamp having hinged plates engageable with the blade, legs depending from the hinged connection between the said plates and having notches receiving the driven shaft, retaining lugs formed on andv projecting k'outwardly Ifrom the legs and engaging the cam recessesl `the blade retainer in the ears for locking thereto, and tension means connected with the plates and the hinged connection therebetween for sustaining the said plates in close contact with the blade.

2. A safety razor comprising tubular inner and outer-shanks, a collar detachably fitted upon the outer end of the outer shank the shank and collar in spaced alining relation to .each other and provided with camI grooves in their inner faces, a guard plate ormed on the inner shank and extending between the ears, a motor casing detachably fixed to the inner end of the said inner shank, a driven shaft disposed within the inner shank and having an abutment ring near the outer end thereof for engagement with the inner shank to prevent outward longitudinal displacement of the said shaft,

spring motor mechanism located wit-hin themotor casing and havingl gear connections with the driven shaft for rotating the same, a sleeve formed on the driven shaft and having a cam slot therein, a shuttle overlying the sleeve and having a lug engaging the said cam, slot for reciprocating said 'shut-- tle on the rotation of the shaft, aboss formed on the shuttle, a slotted blade detaohably engaging the boss and superimposed upon the guard plate, a blade retaining clamp f having hinged plates engageable with the blade, legs depending from Jthe hinged connection between the said plates and having notches receiving the driven shaft, retaining lugs formed on and projecting outwardly from the legs and engaging the cam recesses .in the ears for locking the blade retainer.

thereto, tension means connected with the plates and the -hinged connection therebetween for sustaining the said plates in close contact with the blade, and means for locking the motor against rotation.

In testimony whereof I affix my signature in presence of two witnesses.

MATTHEW C. SHARPNECK.

Witnesses:

C. H. RUTHERFORD,\ N. F. WYKOFF. 

